Re: nm-openvswitch on debian/ubuntu

[Thomas Haller <thaller redhat com>]

On Wed, 2021-07-28 at 15:14 +0200, Sohaib E. wrote:
> I found this error in the logs : ovsdb: Could not connect: No such
> file or directory
>
> My ovsdb's unix socket is in /var/run/openvswitch. I don't think
> Network Manager is expecting another path but if it is, where do I
> change that ?

it's not configurable, it's a compile time constant.

Grep the source for "/db.sock".

But that should be correct already. Did you `systemctl start
openvswitch.sevice`?

Where is your db.sock file exactly?


best,
Thomas


> Thanks.
>
>
> Le mer. 28 juil. 2021 à 12:57, Thomas Haller <thaller redhat com> a
> écrit :
> > Hi,
> >
> > On Wed, 2021-07-28 at 12:41 +0200, Sohaib E. wrote:
> > > Thank you for your quick answer.
> > >
> > > I have compiled NetworkManager's package myself but I still faced
> > some
> > > issues deploying an ovs bridge. 
> > >
> > > Besides the NetworkManager-ovs.conf (openvswitch-switch.service
> > instead
> > > of openvswitch.service), what other settings must be modified for
> > this
> > > to work ?
> >
> >
> > I don't think anything else is missing.
> >
> > Obviously, you need to create connection profiles, read `man nm-
> > openvswitch` about that ([1]). And, you'd activate the right
> > profiles
> > (`nmcli connection up` and watch current setup with `nmcli device`
> > and
> > `nmcli connection`).
> >
> > Other than that, nothing comes to mind. As always when debugging
> > NetworkManager, enable level=TRACE logging and read the log. See
> > [2]
> > for hints about logging.
> >
> > Maybe the path to ovsdb's unix socket is different on the system?
> > That
> > is currently a compile time constant. You should see that in the
> > logs...
> >
> >
> > [1]
> > https://networkmanager.pages.freedesktop.org/NetworkManager/NetworkManager/nm-openvswitch.html
> > [2]
> > https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/blob/2d879c1ac5d907fe184898b23693fb8148363645/contrib/fedora/rpm/NetworkManager.conf#L27
> >
> >
> > best,
> > Thomas
> >
> >
> > > Thank you for your time,
> > > Sohaib
> > >
> > > Le mer. 28 juil. 2021 à 10:39, Thomas Haller <thaller redhat com>
> > > a
> > > écrit :
> > > > On Tue, 2021-07-27 at 18:39 +0200, Sohaib E. via
> > > > networkmanager-
> > list
> > > > wrote:
> > > > > Hello,
> > > > >
> > > > > I'm trying to use Network Manager to deploy ovs bridges on
> > > > > debian/ubuntu. 
> > > > >
> > > > > I understand that Network Manager itself do not have such a
> > feature
> > > > > and needs an additional plugin called nm-openvswitch.
> > Nevertheless,
> > > > > this plugin is not available on debian/ubuntu and, therefore,
> > > > > I
> > was
> > > > > wondering if there was any workaround to deploy ovs bridges
> > using
> > > > > nmcli on ubuntu/debian or to install nm-openvswitch on
> > > > ubuntu/debian.
> > > >
> > > > nm-openvswitch is part of NetworkManager, but
> > > >
> > > > - it can be disabled/enabled at compile time
> > > >
> > > > - it is loaded from a shared library (dlopen), so it can be
> > packaged
> > > > separately (as done on Fedora, with NetworkManager-openvswitch
> > > > package). But it doesn't have to be packaged separately, Debian
> > tends
> > > > to put all these device plugins in the same "network-manager"
> > > > package,
> > > > while Fedora tends to split them (NetworkManager-
> > > > {wifi,team,wwan,...}).
> > > >
> > > >
> > > > Debian builds with this code disabled. You would either have to
> > > > convince the debian maintainers to package this, or build
> > > > NetworkManager yourself. In the latter case, you could just
> > rebuild
> > > > the
> > > > debian package with minor changes to the build settings.
> > > >
> > > >
> > > > best,
> > > > Thomas